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Finding the Fourth Proportional to 138,758.59, 208,197.29 and 43,996.56

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Solution

The fourth proportional to 138,758.59, 208,197.29 and 43,996.56 is: 66,013.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,758.59 : 208,197.29 = 43,996.56 : x
  2. Step 2: Convert to fraction form
    138,758.59/208,197.29 = 43,996.56/x
  3. Step 3: Cross multiply
    138,758.59x = 208,197.29 × 43,996.56
  4. Step 4: Simplify right side
    138,758.59x = 9,159,964,561.32
  5. Step 5: Solve for x
    x = 9,159,964,561.32/138,758.59
  6. Step 6: Final answer
    x = 66,013.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.